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I have a Rinnai R53 tankless water heater, 7 years old.

Customer Question

While taking a shower, it...

I have a Rinnai R53 tankless water heater, 7 years old. While taking a shower, it quit. I pulled the cover and found the two 3amp fuses blown. Turned off power, replaced fuses, turned on power and both fuses blew again. Where do I start looking?

Hello my name is***** to just answer. Let me try to help if i can. I hate to say this, but this is a common problem with toilet cleaner tablets. What you will need to do is get a toilet auger. from home depot or lowe's and auger the obstruction out of the bowl. you want to get the regular and not the drop head version, since the opening in the bowl is narrow. this should get it out for you.

Hi, I'm Mike G and I'll be assisting you. Unfortunately you'll need to replace the PCBoard. It shorted out and there isn't anything other you can do. There is a troubleshooting guide online and that is their direction. Google your model number for the guide.

I have a Rinnai R53 Tankless Water Heater that's 11 years old. It has developed a leak, but it still heats just fine after all of these years. The leak, as best I can tell, is coming from the air inle… read more

I have a paloma tankless water heater that won't go on. I have a trouble shooting guide. Power to nit is good. I replaced 2 3amp fuses as recommended,no joy. This started as a power outage and i suspe… read more

I have a 7 year old Rinnai tankless water heater and recently the hot water while it is running turns cold for sever minutes. I cleaned out the filter but that didn't help. I was told that it could co… read more

My Rinnai tankless water heater quit. We've had several electricians and plumbers come look at it, and they can't figure out what's wrong. So far they have deduced that the unit is getting propane and… read more

I have a Rheem tankless water heater. I went away for a week and when I got back yesterday, I noticed the water is not getting hot! I tried the kitchen faucet, the shower, the bathroom faucet and none… read more

My home water heater started to leak this morning so I need to get a new one. I've looked at tankless water heaters and am wondering if there are recommended brands, etc. I have a 1.5 bathroom home, d… read more

i have a rannai rc80i tankless and i have power at the outlet but the GFI trips as soon as i plug in the heater, i can plug other things in and its fine, the water heater was fine last night, no displ… read more

We have a Rinnai 94LSe propane tankless water heater. Its about 3 years old. Its worked fine until recently. If one sink is running, everything is ok. But if you run two sinks or a sink, shower and wa… read more

I have a Rinnai 53 tankless water heater. When ever it starts up it makes a loud noise which goes away after it runs for a few seconds. The flame is a nice blue color. If I turn the hot water on and o… read more

My shower starts out hot but then after 4-5 minutes goes cold, then 4-5 minutes later gets hot again. Had this problem 4 years ago and I put in a new shower head and it worked. Now it is back. It does… read more

have a Rinnai tankless hot water heater R75-LSi that is ~ 4 years old. No problems up until now. While showering the water temp goes up and down without touching the shower controls. At first I though… read more

rinnai tankless water heater: I live in Austin, TX. My Rinnai R53 is in an non climatized utility closet. When the temperature is below 60, the hot water is not continuous and cycles between hot and t… read more

Sometimes when taking a shower, i get cooler water if not cold water for a moment or two, then water temperature is ok again. Is there some maintenance I need to do to the water heater to prevent this… read more

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.